Fauna and Stratigraphy of tfte Slormlerg Series. 393 



Width at narrowest part of shaft . 17 mm. 

 Thickness of proximal end . . 31 ,, 

 Thickness of distal end . . 20 ,, 



The distal quarter of the bone is twisted to the left as in the 

 type. The bone is more elongate than that of Plateosaxrus quenstedti 

 and the proximal end is more expanded. The proximal half is 

 somewhat similar to that of Plateosaurus erlenbergensis, but the 

 articular surface slopes more strongly and the lateral angle lies 

 nearer the anterior point. The medial border of the proximal end 

 is concave and below it the surface of the bone is hollowed out. 

 The anterior border of the bone is concave, the posterior border 

 straight except at the distal end, where it curves outwards and 

 slightly backwards. 



Fig. 25. Massospondylus harriesi, Br. 

 Right ulna (5135). X J. 



Hand. On the right side there are preserved the three carpale, 

 the 1st. metacarpal and the whole of the 1st. digit. Of the left 

 hand there are the 1st. and 2nd. carpale, all the metacarpals, and 

 the 1st. digit. In addition there is an isolated claw of the right hand. 



The 1st. carpale articulates distally with the 1st. metacarpal and 

 the 2nd. carpale. It is an irregularly oval-shaped thin bone, with 

 a maximum length measured from the medial end to the lateral end 

 of 39 mm. in the left hand and 36 mm. in the right. The thick- 

 ness between the dorsal and ventral edges is 25 mm. (24 mm. on 

 right side). Between the proximal and distal surfaces the distance 

 is 13 mm. (12 mm. on right). 



